You could do, it's only a five minute job and the gaskets are a couple of quid if you need a new set. Mine had been driven by a OAP for 8 years so was full of soot and the big metal pipe going to the inlet was 1/4 of it's original size full of gooey carbon.
Don't think it would hurt and wouldn't trust the Fiat muppets to do it. Giving it a full service tomorrow when the bits arrive so should be as good as new.